hamilton



(No Model.) 2 Sheets-Sheet 1;

B. P. HAMILTON.

SWIVEL TRUCK FOR ELECTRIC RAILWAYS.

55651340- Patented June 21, 1887."

N. PEIERS. inmumo n m Wpshingh-m. ac

(No Model.) I 2 Sheets-Sheet 2. B. F. HAMILTON.

SWIVEL TRUCK IEOR ELECTRIC RAILWAYS.

No. 365,340.. Y I Patented-June 21, 1887.

his Attorney.

UNITED STATES PATENT OFFICE.

BENJAMIN HAMILTON, OF BOSTON, MASSACHUSETTS, ASSIGNOB TO THE ENOSELECTRIC RAILWAY SUPPLY COMPANY, OF SAME PLACE.

SWIVEL-TRUCK F OR ELECTRIC RAILWAYS.

SPECIFICATION forming part of Letters Patent No. 365,340, dated June 21,1887.

Application filed November 11, 1886. Serial No. 218,534. (No model.)

To all whom, it may concern.-

Be itknown that I, BENJAMIN F. HAMILTON, a citizen of the United States,residing at Boston, in the county of Sufiolk and State ofMasssachusetts, have invented certain new and useful Improvements inSwivel-Trucks for Electric Railways; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which'it appertains tomake and use the same.

This invention relates to trucks for use in elevated railways of thatclass in which the motor is mounted upon a truck moving upon a singleelevated rail and the car is suspended by means of a hanger dependingfrom such truck.

' The object of the invention is to produce a truck of such constructionthat curves and in equalities in the track will be socompensated forthat danger of derailment or jarring of the car will be obviated.

Furthermore, the object of the invention is to produce a truck havingthat portion to which the hangers are attached so arranged as to remainin practically the same position at all times.

I With these objects in view my invention resides, essentially, in atruck for railways of the kind described, consisting of two sect-ions,to one of which is attached the wheels bearing upon thesupporting-track, and an upper section connected to the lower section bya swiveled joint in such manner that that portion bearing the wheel iscapable of moving in proper direction'to prevent jarring or undue motionin passing over inequalities in the track or around curves, while theupper portion, to which the hangers supporting the cars are attached,will remain in practically the same position at all times.

the supporting-track upon which the wheels bear. Two of these sectionsare preferably used, one arranged beneath each end of an upper section,D, to which are attached hangers E, to the lower ends of which areconnected the cars which are designed to be supported by the trucks.

It is desirable that the upper portion, D, of the truck should remain asnearly as possible 6 in one position at all times, and should besubjected to no jars, no matter what may be the form of the track overwhich the trucks pass; and therefore I connect the sections B and D by aswiveled connection of such form that 6 the section B, which carries thesupporting wheels, may turn to adapt itself to the form of the trackwithout in any way disturbing the position of the upper portion. Toaccomplish this I utilize the swiveled connection shown more clearly inFig. 4 of the drawings. This consists of the grooved wheel F, mountedupon a shaft, f, secured in a bracket, j", which is attached to theupper end of a standard, f. This standard f is placed in suitablesockets in the lower frame, B, and is secured therein by means of abracket, f and screw f.

The under side of the principal portion of the truck is provided at eachend with two plateshaving curved sockets, f These plates f are of suchlength as to allow such movement of the wheels F as will be necessary inorder that the lower portion, B, of the truck may move to adapt itself,to the form of the track without disturbing the position of the 3 upperportion.

From the foregoing it will be clear that the supporting-wheel of thetruck will be free to move from side to side, as may be required ingoing around curves, 860., without in any way 0 disturbing the positionof the upper portion of the truck, to which the hanger supporting thecar is attached.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

A truck for railways ot the kind described, consisting of two sections,one bearing the supporting-wheels and the other resting thereon,supporting the hangers to which the cars are attached andconnected tothe lower portions by swiveled connections, substantially as and for thepurpose set forth.

In testimony whereof I aifiX my signature in presence of two witnesses.

Witnesses: BENJ. F. HAMILTON.

FRANK D. ALLEN, CLARENCE J.

